Решить СР Вариант №1
Представьте в виде многочлена:
(2а + 7b)² =
(3a – 4b)² =
Вычислите:
39² = 71² =
Упростите:
(2a – 3b)² - 3b (3b - 4а) =
(a – 3)² + (6 - а)² + 2 (a – 3)(6 – а)=
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